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--- rworkshop8 [2014/11/03 15:21]
johannabradie [if and if/else statements]
+++ rworkshop8 [2014/11/03 16:18] (current)
johannabradie
@@ Line 100: / Line 100: @@
 **Exercise**
-. Create an if statement to display
+<code rsplus>
-. Create a vector of positive and negative values.  Use R to take the square root of all positive values in the vector and print "Negative value" where this is not possible.
+Paws<-"cat"
+Scruffy<-"dog"
+Sassy<-cat
+animals<-c(Paws,Scruffy,Sassy)
+</code>
+. Use an if statement to print "meow" if Paws is a "cat".
+<hidden>
+<code rsplus>
+if(Paws=="cat") {
+  print("meow")}
+</code>
+</hidden>
+. Use an if/else statement to print "woof" if you supply an object that is a "dog" and "meow" if it is not.  Try it out with Paws and Scruffy.
+<hidden>
+<code rsplus>
+if(Scruffy=="dog") {
+  print("woof")
+} else {
+  print ("meow")
+}
+if(Paws=="dog") {
+  print("woof")
+} else {
+  print ("meow")
+}
+</code>
+</hidden>
+. Use an ifelse statement to display "woof" for animals that are dogs and "meow" for animals that are cats.
+<hidden>
+<code rsplus>
+ifelse(animals=="dog","woof","meow")
+</code>
+</hidden>
 ==== Loops ====